Shoe-sole trimmer



Jan. 26 ,1926. f n 1,570,838

l c. JACKMAN 'SHOE sQLE Truman Filed May 4, 1923 ljlqll Patented Jan. 26, 1926.

' Unirse STATES I PAT-ENT OFFICE.,

' CHARLES JACKMAN, or roRTsMcUrI-I, on1o,"AssIGNoR or ONE-HALF rro PEARL E.

SHOE-SOLE TRIMMER.

Application filed May 4, 1923. Serial No. 636,635.

To all whom t may concerne: c l

Be it known that 1 CHARLES JAQKMAN, citizen of the United. States, residing at Portsmouth, in the county of Scioto land State ofOhio, have invented certain new and 'useful Improvements in Shoe-Sole Trimliners, of which the following is a specification., c This invention appertains to certainimprovements in material cutting or trimming apparatus generally, and more particularly to a type of the same usually employed inl fully 'described7 set forth in the appended' claims, and illustrated vin the accompanying drawings, in which Y' v Figure 1 is an' end elevation, partly in section, of the improved'form of trimming cutter, and showingr the manner of use of thesame, l

Figure v.2 a sectional detail of a preferred embodiment of trimming cutter, the same being taken on the line 24-2 ofFig-v ure 4,

Figure 3 is a vertical section taken on the line 3-3 of Figure 1, and,

Figure 4 is a fragmentary plan view ofV lthe said trimming cutter. Y

Referring to the drawing, wherein similar characters of reference designate corresponding parts throughout the several views thereof, the numeral 10 indicates a circular cutter body formed to provide an offset concentric hub or sleeve portion 11 fo-r engagement on tlie'reduced end portion 12 of a driven shaft E13, the free end of the hub or sleeve 11 being disposed in abutting relation to the shouldered portion 13 at the linner endrof the reduced lporll'ionvl7 when in proper operating positron thereon. This cutter body 101s -Of any hea-ive ,or usual vcmistruction having principal object of the invention is.

equidistantlysspaced cutting` l teeth v S14 formed on the peripherythereof with bevyeled cutting lips 15 at theirvopposite ends and which operate to increase, to ya slight extent, the depth of cut at-the extreme upper and lower edgesy of the material, when the latter is held edgewise against the outer faces of the cutting teeth-14` for the pur-l pose, substantially assho'wn. c a

Adapted to be abutted againstv the outer side of thecutter body, 10 isa cutter guard or shield 16, which is of a diameter slightly greater than that of the yactive cutting portion `of the cutter body, so as to have its peripheral edge project beyond the outer of theflip portions l5 of the'latter' and to act 'in conjunction withy the beveled face portions-14 ,at the inner ends of the cutter teeth 14, to accurately guide the material against the outer. faces of the'cutting teeth during the cuttiiigor trimming operatiom This guard or shield 16 is preferably formed tojprovi'de a thickened central portion having flat inner and outer'faces Yand an outer portion beveled off from-the edge of the outer flat face yand-outwardly therefrom to the yperipheral edge so as to reduce` the thickness of the llatter to'- an appreciable extent. The inner side of the peripheral edge .of the guardor shield 16 is sharply beveled, as at 17 in a reverse direction with respect to the bevel at the outerV side thereof, whereby to provide aslight clearancebetween the salme and the'opposed surface of the material when the lat-ter is being worked `and is positioned with respect tothe bevel shown in Figure S This bevel 17 extends in the direction reversed to that of they bevel face 4'portions'14, at they inner endsfof the cutter teeth 14, and cooperate therewith to guide the material when the latter is moved against the outer faces of the cutting. teeth 14. Formed inwardly ofv the peripheral edge of the guard'or shield'l', and extending partly into the beve-led portion17 thereof, are a. series of equidistantly spacedopenings or circular holes 18, which open through thcshield Ybody inthe. path of the outer of the lip lportions 15 in their cutting operation on the outeredge ofthe material, the openings or holes 18 being so arranged that the top edges vof the said outer cutting lips 15 pass the same at their centers,

To -eifect the proper mounting of the guard or shield 16 in position, the bore of the cutter body 1()` and the hub or sleeve portion 11 is of a slightly greater length than the reduced end portion 12 of the shaft 13, so that the thickened central portion of the guard or shield seats in the outer end of the said bore and abuts the outer end of the shaft portion 12. rlhe inner flat face of the guard or shield 16 is formed to provide an annular groove yor channel v19 in concentric relation to the inner seated portion of the thickened central portion thereof, and this groove or channel 19 is of a Width `to admit of the concentric portions of the inner face at the outer side thereof to firmly abut the outer end faces of Athe cutter teeth 15, and also provides for `a clearance .between the guard or shield 16 andthe adjacent Vinner end portions of the cuttersteeth 14- for the passage of the 4.dust from the cutting or trimming operations from between vvthe latter. The yguard Vor shield 16 is secured in position by means of a screw 2O which is passed through an opening formed 'centrally through the 'thickened portion thereof and into engagement with a threaded recess in the outer end of fthe shaft end 12. The outer Aend of the screw receiving opening in :the guard or shield 116, is preferably formed :with a counter bore to seat therein a .shouldered portion A20, formed immediately inward of the head of the screvv 20, which, in turn, abuts the outer fiat face of 'the centrally thickened portion ofthe guard or shield, the opposed face portions of Y'the latter and the Vscrew head, together vwith the shouldered portion 20, being of a substantial area to assure of the firm .aud :uniform clamping of the parts together.

ln the trimming operation on the edge of a shoe sole or the like, `and With the parts constructed and assembled ,as herein before indicated, `the :edge of the sole or material is dis-posed 'tangentially 4to the peripheral edge of .fthe `cutter body 110 .and is pressed against the outer faces of the cutters 11i between the side :beveled faces 154 `ythereof and the opposed inner .beveled edge .1T of the :guard-orshiel'd 1 6, which beveled faces and edge .tact to effect the accurate seating of `the material against 1the cutters la. During the cutting "or Ytrimming operation, :should any `,tearing or shredding f the bers fof :the -inaterial occur, `especially at :the outer er upper side l:of zthe edge theren of,these1torn :or shredded Yportimns are re- .inoved by reason ofthe cooperation between the "openings '18, in .the guard or shield A16, and fthe outer of the cutting lips 15, ofthe cutting teeth 14 the esame acting to shear oli between them zalfl'of such torn I or-shredded portions @and in ia manner to leave Vthe inshed "e-:lge of fthe material continuously smooth throughout its extent. The cutting action of the lips 15, of the rotary cutter 10, is such as to slrive the edge of the material, and, in so doing, very often turns up a fuzzy edge on the latter, and, in the use of the guard or shield 16 in conjunction with the cutter 10, and providing the latter With the holes 18 to cooperate With the cutting lips 15, this fuzzy edge is entirely eliminated. ln practice, it has been found that the rapid rate of speed at Which the cutter 10 is ordinarily driven, that the peripheral edge portion of the guard or shield 16 has imparted thereto a Whipping action which gives to the sides of the holes 1S an abrading effect, which, in conjunction with :the .cutting action of fthe outer edge of the cutting lip 14', results in the desired smooth finish of the edge of the material.

From the foregoing, it Will be readily apparent that, While a preferred embodiment of the cutting or trimming mechanism has been described and illustrated herein in specific terms and details of construction and arrangement of parts, various changes in and modifications of the same :may be resorted to Without depa-rting from the spirit of the invention, or the scope of the claims appended hereto.

Having thus fully described the invention, What is claimed, is

1. The combination With a rotary cutter for trimming the edge of shoe soles and the like, of a guard mounted at one side of said cutter and having openings therein inwardly of the edge cooperative With the cutting elerments `.of the cutter for; trimming the adjacent vside edge kof the edge face of a vshoe sole being Worked.

2. The combina-tion with a :shoe soletriminn'g mechanism, of a driven shaft, a cutter mounted at the outer end of said shaft, and an annular guard disposed at the outer side of vsaid cutter and Vhaving transverse .bores :therein cooperative with the cutting `elements 0f the cutter for trimming the adjacent side edge of the edge face of a shoe lsole heilig Worked.

3. The combination with a shoe'sole triniming. mechanism, of a `driven shaft, a cutter mounted at the outer end of Vsaid shaft, a circular guard disposed at the outer side of said cutter and .having vtransverse bores en tending therethrough cooperative with the cutting elements of the cutter for trimming the Vadjacent side edge of the edge face of a `shoe sole being Worked, and means for se curing said guard in position at said shaft end.

4. The combination with a shoe sole trimming mechanism, of a rotary trimming element having its peripheral -edge formed to provide a plurality of cutting fteeth'thereon,

:cutting lips .farmed ait-the outer side edges of said cutting teeth, andan annular guard disposed at the outer side of said trimming element and having a series of openings formed transversely therein for cooperation with said cutting lips Whereby to effect the smooth trimming of the adjacent Side edge of the edge face of a shoe sole being Worked. I

5. In a shoe sole trimming mechanism, a rotary trimming member having a peripheral series of cuttingv teeth thereon,foutt1ng lips formed on said member at the 'outer the eutting'lips of said trimming member .I

for trimming the edge face of a shoe sole being Worked.`

CHARLES JACKMAN. 

